Ultraviolet active wristband

Claims

1. An ultraviolet active wristband comprising:

(a) a substrate material selected from the group consisting of paper and plastic, and,

(b) a clear ink composition comprised of an ink vehicle used in screen printing, and, of 0.2% to 1.5% in weight photochromic compound selected from spiroxazine molecules or spiropyran molecules;

wherein said ink composition is applied to the said substrate to form a wristband sensitive to ultraviolet radiation.

2. The clear ink composition of claim 1, further comprising:

(c) anti-oxidants consisting of Hindered Amine Light Stabilizers and Hindered Phenolic Anti-oxidants;

3. The clear ink composition of claim 1 is applied onto a substrate material selected from the group consisting of plastic and paper by means of known screen printing techniques.

4. An ultraviolet active wristband comprising:

(a) a polymer matrix selected from the group consisting of optically clear plastics, and,

(b) a photochromic compound selected from the group consisting of spiroxazine and spiropyran molecules;

5. The ultraviolet active wristband of claim 4, further comprising:

(c) anti-oxidants consisting of Hindered Amine Light Stabilizers and Hindered Phenolic Anti-oxidants;